Former House Speaker Newt Gingrich said he's counting on his potential foes for the Republican presidential nomination to use his past infidelities against him.

Gingrich, who's exploring whether to run for president, said he anticipated that his competitors for the nomination would dig into his past, including his admitted extramarital affairs.

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"I expect my opponents to go back 15, 20, 25 years and try to render an alternate judgment," Gingrich said Monday evening on WRKO radio. "I understand that's what they'll do."

None of the potential candidates has yet attacked Gingrich because of his past dalliances. But with the race barely under way, and with each candidate set to battle fiercely for the support of social conservatives, murmurs about the former Speaker could begin to emerge.

Gingrich has said he hopes primary voters look at the totality of his life and record, including his apologies for having committed adultery in the past. Voters, Gingrich said, should look at who he is today.

"Callista and I have a great marriage. And people have to decide, you know, is this a person they can be comfortable with, the person that I've become," he explained.

Gingrich said he believed that "most Americans are fair" and will look at the whole of his life.